Abstract
Based on effective medium theory and dielectric resonator theory, we propose the design of reconfigurable all-dielectric metamaterial frequency selective surfaces (FSSs) using high-permittivity ceramics. The FSS is composed of ceramic resonators with different band stop responses under front and side incidences. By mechanically tuning the orientation of the ceramic resonators, reconfigurable electromagnetic (EM) responses between two adjacent stopbands can be achieved. The two broad stopbands originate from the first two resonant modes of the ceramic resonators. As an example, a reconfigurable FSS composed of cross-shaped ceramic resonators is demonstrated. Both numerical and experimental results show that the FSS can switch between two consecutive stopbands in 3.55–4.60 GHz and 4.54–4.94 GHz. The design method can be readily extended to the design of FSSs in other frequencies for high-power applications.
Highlights
Based on effective medium theory and dielectric resonator theory, we propose the design of reconfigurable all-dielectric metamaterial frequency selective surfaces (FSSs) using high-permittivity ceramics
We proposed the design of reconfigurable all-dielectric metamaterial frequency selective surfaces (FSSs) using high-permittivity ceramics, without using any metallic parts
Considering that the central operating frequency of the FSS is at about 4.7 and 4 GHz, the unit cell size of the FSS is small enough compared to the operating wavelength
Summary
Based on effective medium theory and dielectric resonator theory, we propose the design of reconfigurable all-dielectric metamaterial frequency selective surfaces (FSSs) using high-permittivity ceramics. We proposed the design of reconfigurable all-dielectric metamaterial frequency selective surfaces (FSSs) using high-permittivity ceramics, without using any metallic parts. Both the simulation and experiment results verify the band stop property of the designed FSS Since such FSSs use high-permittivity ceramic particles as the unit cell, ohmic losses and low breakdown voltages inherent to metallic structures are avoided. Such FSSs own great advantages in high-temperature and high-power applications This kind of reconfigurable FSS can achieve two adjacent stop bands by rotating one structure. It can be used in RCS reduction techniques and reconfigurable antenna systems, etc
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